According to Kleiber's Law, the metabolic rate P (in kilocalories per day) and body mass m (in kilograms) of an animal are related by a three-quarter power law given below. Estimate the increase in metabolic rate when body mass increases from 65 to 66 kg. (Round your answer to one decimal place.)

P = 73.3m3/4

To estimate the increase in metabolic rate when body mass increases from 65 to 66 kg, we can use Kleiber's Law equation:

P = 73.3m^(3/4)

To find the increase in metabolic rate, we need to subtract the metabolic rate at 65 kg from the metabolic rate at 66 kg.

Let's calculate the metabolic rate at 65 kg first:
P₁ = 73.3(65)^(3/4)

Now, let's calculate the metabolic rate at 66 kg:
P₂ = 73.3(66)^(3/4)

To find the increase in metabolic rate, we subtract P₁ from P₂:
Increase in metabolic rate = P₂ - P₁

Let's calculate the values:

P₁ = 73.3(65)^(3/4) ≈ 1061.6 kilocalories per day
P₂ = 73.3(66)^(3/4) ≈ 1076.6 kilocalories per day

Increase in metabolic rate = P₂ - P₁
= 1076.6 - 1061.6
= 15 kilocalories per day

Therefore, the estimated increase in metabolic rate when body mass increases from 65 to 66 kg is approximately 15 kilocalories per day.